4S 16.8V 8A 18650 BMS Protection Board

The 4S 8A 16.8V Li-Ion Battery Protection Board (BMS) is a compact battery management solution designed for 4-cell lithium-ion battery packs built with 18650 cells. It provides essential protection during charging and discharging by monitoring battery voltage and current conditions. The board helps prevent overcharging, over-discharging, overcurrent, and short-circuit damage, improving battery safety and extending battery life. With low quiescent current and compact dimensions, it is suitable for portable electronics, LED lighting systems, DIY battery packs, robotics projects, and energy storage applications. Features Designed for 4S lithium-ion battery packs Compatible with 18650 lithium-ion cells Supports 16.8V charging systems Overcharge protection function Over-discharge protection function Overcurrent protection function Short-circuit protection with recovery Low standby power consumption Compact and lightweight PCB design Automatic charge recovery after protection Reliable battery voltage monitoring Improves battery pack safety Suitable for DIY battery pack assembly Easy integration into portable power systems Specifications Model: HX-4S-A01 Battery Type: Lithium-Ion (18650) Battery Configuration: 4S Nominal Battery Voltage: 14.8V Charging Voltage: 16.8V – 17V Overcharge Protection Voltage: 4.25V – 4.35V Over-Discharge Protection Voltage: 2.3V – 3.0V ±0.05V Continuous Working Current: 6A – 8A Maximum Instantaneous Current: 12A Quiescent Current: <30?A Internal Resistance: <100m? Short Circuit Protection: Yes Recovery Method: Charge Recovery Operating Temperature: -40°C to +50°C Application: Battery Pack Protection and Management Tutorials How To Make A 4S Battery Pack | using 3.7v Lithium Battery